Advantage&colon;A&period; Low failure and long working life&colon; The System always runs well more than 30000 hoursB&period; Perfect stability&colon; In normal condition remains good output&comma; and the special types run well in execrable conditions&period;C&period; High efficiency & capacityD&period; Superior safety and reliability&colon; Dynamic micro-computer control systemE&period; Energy consumption saving